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Demodicosis in an American bison.

J G Vestweber1, R K Ridley, J C Nietfeld

  • 1Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan 66506, USA.

The Canadian Veterinary Journal = La Revue Veterinaire Canadienne
|June 15, 1999
PubMed
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An American bison calf experienced Demodex mite nodules. The infestation resolved spontaneously within six months, indicating potential natural resilience in young bison.

Area of Science:

  • Veterinary Dermatology
  • Parasitology
  • Wildlife Health

Background:

  • Demodex mites are common causes of skin disease in various mammals.
  • Bovine demodicosis typically affects cattle, but can occur in other bovids.
  • Information on Demodex infestations in American bison is limited.

Observation:

  • An 18-month-old male American bison presented with multiple periorbital, perineal, and tail base nodules.
  • Nodules measured 7-9 mm and exuded material.
  • Microscopic examination of exudate identified Demodex spp.

Findings:

  • The Demodex mite infestation in the American bison showed significant improvement.
  • Lesions nearly cleared without any specific antiparasitic treatment.
  • Spontaneous resolution occurred within a 6-month observation period.

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Implications:

  • This case suggests American bison may have a capacity for spontaneous resolution of Demodex infestations.
  • Further research could explore host-parasite interactions and immune responses in bison demodicosis.
  • Findings contribute to understanding dermatological conditions in American bison populations.